Chainsaw Repair

So I made a small set of calipers so I could get around the cylinder and measure the bolt pattern on the TA 3750 and a 365 I have.    From side to side on center the pattern is 49mm.    From front to back on center the pattern is 45mm.   Both the 365 and the 3750 are the same.   

So I am thinking you are correct in stating that the only difference is going to be the boot intake and carb, and the location of the impulse.